LeBron Asks: Why does humidity make it feel hotter?

[@w215philly]

I'm not a LeBron fan, I'm not even a basketball fan for that matter. But I think that it's awesome for someone who is admired by so many young people, to partner with an incredible learning resource like Khan Academy.

[@misterkefir]

Damn.. your drawing/writing skills are exceptional !

[@laharl2k]

water has higher thermal conductivity than aire and most plastics and wood. same with humid aire itself. if you put your hand in a bucket with water at 40ºC you will get burned, if you touch a plastic boutle at 40ºC you will just feel it hot. same with ice (0ºC) and a frozen bottle(0ºC) ice will burn you (cold burn) while the bottle will just feel cold. the higher TC things have the more hot/cold things feel for X temperature.

[@soangry]

As long as the air temperature is below your body temperature you will still lose heat to the air, it's just not as quick and efficient as sweat evaporation.

[@Kram1032]

Of course, that's obvious. Though even here, in intermediate climate, you can have peak temperatures above body temperature in summer. I'm not quite sure how the yearly temperature graph looks like in tropical areas but I'd guess that it reaches higher levels frequently.

[@Biggaelle]

3:53 I thought he was gonna leave it as "Easy E," and gained so much respect. Then let down.

[@WillKrepelin]

while there is a positive correlation under normal circumstances between temperature and kinetic energy that is not what temperature is. 1/T is the slope of the curve of the entropy of a system as a function of the energy of a system. I know it's a complicated concept but it would be nice if you eluded to it being different than just a measure of kinetic energy.

[@ny1fanta]

I watch this because new York is humid today

[@Kram1032]

I wonder what happens in tropical regions where humidities around 90-100% are the norm. How do those people cool down? Or how do they deal with this in general, if they can't cool down?

[@joeKisonue]

The people of Equator are known to move as slow as snails.

[@soangry]

As long as the pool is colder than your body temperature you will still radiate heat directly into the water.

[@christo930]

What happens when water condenses on your skin? Won't there be additional heat from the latent heat effect? Same thing for evaporation, doesn't that also consume heat and cause an evaporative cooling effect by direct absorption of heat?

[@IHeartViHart]

Lol 3:55. I thought he was going to leave that "Easy E" as a nod to the rapper Eazy-E.

[@VinothKumar-qo7ry]

Tank u sir

[@GigaBoost]

Nice education system you got there.

[@excelon13]

Congratulations, your parents must be proud.

[@Menegoth]

Psh, you're just being passive aggressive because you weren't first

[@franklafortune1345]

What then happens when you jump in a pool?

[@TVinmyEye]

You kinda sound like Samuel L Jackson haha. Anyway great presentation!

[@elvircrn]

Lemme guess... You?

[@elvircrn]

Don't you mean "winner"? Was that supposed to be funny?

[@jeoung0325]

woah

[@S1rjoemama]

lebron should ask where his hairline went

God. I am SO glad this guy is NOT my teacher. He is like a friend of mine who is scientifically oriented, a computer nerd. Ask a question and he wanders about forever bringing in all kinds of extraneous info that one does NOT have to have. DUDE: use the last 45 seconds of this video to make the point why humidity makes one feel hotter and THEN go on to explain in detail why. And STOP repeating yourself....the typical reader is NOT interested in so much detail.

[@messionrlfifa6592]

MIke MIhaljevich you know sal khan?

[@Menegoth]

guess who's first?